320626121 has 6 divisors (see below), whose sum is σ = 338389722. Its totient is φ = 303750720.

The previous prime is 320626099. The next prime is 320626153. The reversal of 320626121 is 121626023.

It can be written as a sum of positive squares in only one way, i.e., 176890000 + 143736121 = 13300^2 + 11989^2 .

It is a de Polignac number, because none of the positive numbers 2^k-320626121 is a prime.

It is a super-2 number, since 2×320626121² = 205602218935013282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320626421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 443720 + ... + 444441.

It is an arithmetic number, because the mean of its divisors is an integer number (56398287).

Almost surely, 2^320626121 is an apocalyptic number.

It is an amenable number.

320626121 is a deficient number, since it is larger than the sum of its proper divisors (17763601).

320626121 is an equidigital number, since it uses as much as digits as its factorization.

320626121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888199 (or 888180 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 320626121 is about 17906.0358817914. The cubic root of 320626121 is about 684.4361929701.

It can be divided in two parts, 32062 and 6121, that added together give a palindrome (38183).

The spelling of 320626121 in words is "three hundred twenty million, six hundred twenty-six thousand, one hundred twenty-one".